Personalized I'm One Superhero Infant Romper. I'm One! Superhero toddler in a red cape and diaper is ready to fight crime and nap time. Cute gift for any superhero one year old's 1st birthday. Meet your new favorite outfit! Keep dressing simple with this one piece, lap shoulder t-romper. Super soft and perfect for baby's sensitive skin. 5.5 oz. 100% combed ringspun cotton premium jersey (CVC Colors are 60/40; Heather is 90/10 combed ringspun cotton/polyester)